These photoreceivers are ideal for fast, accurate, waveform measurements across all wavelengths from 450–1630 nm. Their clean pulse responses along with their DC coupling makes them well-suited for time-domain characterizations of 2.5-Gbit/s components and extinction-ratio measurements across popular protocols. The high gain and gradual well-behaved roll-off of the frequency response make them useful also for frequency-domain measurements. For those applications that cannot tolerate DC coupling, there is a convenient switch to convert the photoreceiver output from DC- to AC-coupled—while still preserving the same overall photoreceiver performance.
All Model 1591 and 1592 photoreceivers come standard with multimode 62.5-micron fiber inputs, and a convenient DC-bias monitor that has a transimpedance gain of 1 mV/µA and a bandwidth of 50 kHz.
Eye diagrams as measured with a Model 1592 on a 12.5-Gbps system. Bit rates are 2.5, 3.125, and 5 Gbps, respectively.
Applications
Characterizing 2.5-Gbit/s components, including BER testing and generating eye diagrams
Heterodyne experiments
Characterizing the frequency and/ortime responses of pulsed lasers,modulators, transmitters, and other lightwave components
Typical responsivity of Model 1591.
Model 1592 typical pulse and step response. The step height is achieved with 0.5 mW of optical power. The pulse height is achieved with a 50-fJ pulse at 1550 nm. For Model 1591 , the values corresponding to the output levels shown are 1.1 mW and 90 fJ at 850 nm. NOTE: Pulse response measured on a 50-GHz oscilloscope with a 1-ps optical pulse. Step response calculated from pulse response.
